238472509 has 8 divisors (see below), whose sum is σ = 260986752. Its totient is φ = 216097440.

The previous prime is 238472483. The next prime is 238472543. The reversal of 238472509 is 905274832.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 238472509 - 2¹⁷ = 238341437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238472609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31189 + ... + 38074.

It is an arithmetic number, because the mean of its divisors is an integer number (32623344).

Almost surely, 2^238472509 is an apocalyptic number.

It is an amenable number.

238472509 is a deficient number, since it is larger than the sum of its proper divisors (22514243).

238472509 is a wasteful number, since it uses less digits than its factorization.

238472509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69587.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 238472509 is about 15442.5551318427. Note that the first 3 decimals coincide. The cubic root of 238472509 is about 620.1252859889.

The spelling of 238472509 in words is "two hundred thirty-eight million, four hundred seventy-two thousand, five hundred nine".